A full lake begins dropping at a constant rate . After 4 weeks it has dropped 3 feet . What is the unit rate of change in the lakes level compared to it's full level?

72 is the answer to this problem

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

correct answer:

b.(19,-2)